Evaluation of Land Ecological Safety Based on Fuzzy Matter-Element Theory

Study on land ecological safety has become a forefront topic of regional sustainable development. The paper constructed an evaluation index system of land ecological safety. Then it discussed the ranges of indexes corresponding to each evaluation grade. Considering the illegibility and uncertainty in land ecological safety evaluation, the paper combined fuzzy matter-element and entropy method to establish an evaluation model of land ecological safety. Then it developed a case study on Hebei Province. The results show that there is a tendency of gradual improvement. Conditions of land ecological safety of 2000 and 2001 belong to relatively unsafe grade and the other six years belong to critically safe grade. Land ecological safety conditions of Hebei Province from 2000 to 2007 are unsatisfactory and need to be improved. The results can reflect the real conditions of land ecosystem of Hebei Province.